Abstract
THE search for correlations between the radio properties and optical red-shifts of quasars has so far met with only limited success. Evidence for the existence of a relation between red-shift and magnitude for quasars with flat spectra was given by Bolton1 and by Horton and Daintree2. It seems that the dispersion in the properties of all quasars is large, but that the radio spectral index is suitable for selecting groups of quasars the properties of which have smaller intrinsic dispersions. Here this technique is used to investigate the variation of the angular dimensions of quasars with red-shift.
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References
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MILEY, G. Variation of the Angular Sizes of Quasars with Red-shift. Nature 218, 933–934 (1968). https://doi.org/10.1038/218933a0
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DOI: https://doi.org/10.1038/218933a0
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